Edward Snowden's appearance at SXSW and Mark Zuckerberg's phone call to President Barack Obama are some of the top tech stories from the week. WSJ's Scott Austin joins digits. Photo: Getty Images.

This transcript has been automatically generated and may not be 100% accurate.

... the top three intact here at the beest live I'm Simon Constable and hit a helpless ... as always and skull Austin tech editor who will Street don't thanks Ming update to do ... so ... it sometime it's time fall ... break ... that number theory Edward Snowden makes an appearance at South by Southwest in Austin and via a remote connection we should point out to do nicely stepped in to Texas ... that is correct yes he is on the low was ironic use Devitt to Google Hangouts which ... his whole point ... five years the price up was was to say that tech companies ... are not doing enough from a technical standpoint encrypt their data ... and I'm you know there is somewhat of a cover rally cry for his believers ... the NSA is setting fire to the future the internet ... you're all our ... firefighters mean everyone here is ... is able to to take this in our own to control and demand from these companies ... to really ... I do more more again on the technical side can encrypt things and ... use early Tuesday just to see him there he was kind of the biggest rock star ... you know the music portion is happening this week ... at South by Southwest but the tech portion ... I Curie was in the giant video screen ... you know really talking about what he was doing I'm as the whistleblower in here is the US fugitive ... the greatest enemy of the National Security Agency to some believers ... I also ... you know really someone to ... I was able to disclose so much and really helped ... to get out and people are still divided on this on to say is that there are some tips I is that right I've I've talked about but sometimes it will put Eliot they didn't consult about the exciting thing isn't whether you know this is something he should've done and B I wrote one of the question of course he says Apsel yes if he's able to do this again he would ... have been trusting cannot summon the strength ... of its own now ... Mark Zuckerberg calls Obama I do think is this funny is that that the fact that he comes out with this up first on Facebook saying that he called Obama the everyday it's almost like he has ... been a red phone that has the exact less so this is Silicom Valley versus Washington the tensions can it continue ... I'd you know earlier this week the spills and from the Edward Snowden ... that's up by Southwest other more Snowden Docs ... documents they came out ... said the NSA has a program ... to mimic Facebook's servers ... tied to gain access to the computer so you think you're on Facebook and really ... yummy NSA is tight ... servers their ... eye and say so that this is inaccurate ... Mark Zuckerberg the CEO Facebook came out with his own bought the sun on Facebook saying that it is just too much damage being called ... caused by the U S government's data collection ... efforts ... the U S government should be the champion of the American and not the correct ... and audio Sky continues again ... for this tension in the sense of irony that the name of untied said his company like songwriter break from ... all sides he know ... because the auditor unit for their own good ... so you know again will see because what happens going to sign a family rate set his sights on again it's time fall mobile one ... at number one this is just breaking today that Alibaba is most likely plant in its IPO flag ... here in New York ... there's been a lot of questions whether the biggest Chinese the e-commerce ... company ... I would be listing in Hong Kong weather would actually be doing this in the U S cents ... in Hong Kong and they have certain rules they're one of them is that company boards ... I really should be nominated by shareholders in Alibaba wants to protect what it says is its entrepreneurial culture so that this tool stock listing Facebook has done where the founder really controls a lot of the company ... and and that's I see that culminated in media companies as they did in the U S this was an Internet companies are and what one of things that others there's much more listing requirements a much more disclosure that its were quiet here in the U S says it isn't about ... it and that that that that they would come Hannah because of the reason is very interesting thread and this is going to be ... one of the largest ideas of all time really ... probably equivalent of Facebook which raised sixteen billion dollars so there's a lot at stake of course in your stock Exchange and Nasdaq one be courting Alibaba heavily and abilities to deceive insisted that competition in China with Tencent and Baidu some these other ... massive Internet companies ... how this official ... affords penalties from Bank is so all of the month ... while it is going right about now ... thank you Brian much skull Austin tech editor of The Wall Street John all I'm Simon Constable ... and that was your top three intact ...